Free of aluminum antiperspirants, this herbal scented spray deodorizes with apple cider vinegar and essential oils, leaving harsh and harmful chemicals out. The active ingredient in this spray is the apple cider vinegar. It is a probiotic ferment of apples. The fermenting of the vinegar creates a yeast enzyme that uses ammonia (the bad, smelly stuff in sweat) to make amino acids which don’t have any scent.